25220012123 has 2 divisors, whose sum is σ = 25220012124. Its totient is φ = 25220012122.

The previous prime is 25220012107. The next prime is 25220012131. The reversal of 25220012123 is 32121002252.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25220012123 - 2⁴ = 25220012107 is a prime.

It is a super-2 number, since 2×25220012123² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 25220012095 and 25220012104.

It is not a weakly prime, because it can be changed into another prime (25220012183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12610006061 + 12610006062.

It is an arithmetic number, because the mean of its divisors is an integer number (12610006062).

Almost surely, 2^25220012123 is an apocalyptic number.

25220012123 is a deficient number, since it is larger than the sum of its proper divisors (1).

25220012123 is an equidigital number, since it uses as much as digits as its factorization.

25220012123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 25220012123 its reverse (32121002252), we get a palindrome (57341014375).

The spelling of 25220012123 in words is "twenty-five billion, two hundred twenty million, twelve thousand, one hundred twenty-three".